The amount of irrigated land used to produce food crops has increased since 1950 . It can also be said that:
a. The amount of irrigated land per person has increased since 1950
b. The amount of irrigated land per person has decreased since 1950
c. The amount of irrigated land per person has stayed the same since 1950
d. The amount of irrigated land per person for this time period is not known
e. The amount of irrigated land per person has increased in some areas and decreased in others
B
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The mass extinction at the end of the Mesozoic was of far greater magnitude than the extinction
at the end of the Permian. Indicate whether the statement is true or false.
The ____ is solid and much denser than the ____, with temperatures as hot as the surface of the sun
a. outer core; inner core b. inner mantle; outer mantle c. outer mantle; inner mantle d. inner core; outer core e. lithosphere; asthenosphere
If P and S waves were to travel at the same constant speeds, what could be inferred about the Earth's
interior? a. The interior is density stratified. b. The interior is liquid. c. The interior is homogenous. d. The interior is solid
Photosynthesis is the process whereby animals break down large molecules such as sugars into smaller molecules.
Answer the following statement true (T) or false (F)